Home / 139,631.22-209,415.78-39,789.54

Finding the Fourth Proportional to 139,631.22, 209,415.78 and 39,789.54

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Solution

The fourth proportional to 139,631.22, 209,415.78 and 39,789.54 is: 59,675.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,631.22 : 209,415.78 = 39,789.54 : x
  2. Step 2: Convert to fraction form
    139,631.22/209,415.78 = 39,789.54/x
  3. Step 3: Cross multiply
    139,631.22x = 209,415.78 × 39,789.54
  4. Step 4: Simplify right side
    139,631.22x = 8,332,557,554.94
  5. Step 5: Solve for x
    x = 8,332,557,554.94/139,631.22
  6. Step 6: Final answer
    x = 59,675.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.